I took David to Cambridge last weekend - his first trip there ever, though he's lived within driving distance for more than 20 years. He seemed vaguely surprised that there weren't liberal snipers posted at turrets, waiting to pick off the unconverted. (If he'd shown his face during the 2004 campaign, it would have been a different story.) He found Cambridge strangely congenial, full of all the smart and interesting types he likes. We ate Korean food, checked out the funky little stores, laughed at the fact that there really is a "Dewey, Cheatem & Howe" sign up in a Harvard Square window. Turns out Cambridge opens its arms to everyone. Ah, the beauty of diversity.